Weft stop mechanism for looms



` March 13, 1928. 1,662,499

E. GUILBERT, JR l a a? fr. di mud!! @ja Hf@ v 36 l kh l Li-Q J7 E i E Q ff@ l /w/M/ f E, GUILBERT, JR

WEFT STOP MECHANISM lFOR LOOMS File ICh 2%1927 2 Sheets-Sheet .2

March 13, 1928. l 1,662,499

Patented Mar. 13, 1928.

UNITED STATES EDMOND GUILBEBT, JR., or woonsooan'r, airone isnann.

WEET s'ror MncnANIsM For:J Looii/rs` l Application led March 26, 1927. Serial No. 178,586. y

The present invention relates to an improveuient in wett stop mechanism for looms.

Generally stated, in looms operating on each pick ot the lay to throw a plurality et shuttles through a corresponding number of sheds for weaving various sorts of fabrics diicultyv has been experienced in providing the loom with weft stopping mechanism for stopping the loom on the failure of a` wett. This diHicult-y has been met particularly in plush looms employing two shuttles thrown through two sheds simultaneously in weaving two superposed fabrics, one in one shed and the other in the other shed, which are subsequentlyv cut lto :torintwo pieces of pile. fabric. In the latter type of loom it has been proposed to provide a weft detector for feelingof both wei'ts, butobviously to cause such detector to distinguish between `the presence of two wefts and one weft is a matter of diliiculty, and the loom should be stopped, of course, upon the failure of either one of the wefts.

The present invention contemplates a loom employing a plurality of shuttles, provided with weft detectorsfor the purpose of detecting failure of any weft, and` in addition, in cert-ain improvements in weft stop mechanism hereinafter described and particularly defined in the claims.

In the accompanying drawings illustrating the preferred form of the invention as applied to plush looms, Fig. 1 is a dia-grammatic plan of a'portion of a plush loom illustrating the invention; Fig. 2 is a crosssection through the breast beam and the lay, showing the relation of the detectors to the lay and the shuttles carried thereby; F igs. 3 and 11 are respectively an enlarged plan and elevation of one of the weft detectors;

F ig. 5 is an enlarged longitudinal medial section in vertical elevation of the rear end ot one of the weft detectors and associated oartsand Finis. 6 and 7 are. res 'ectivel f Y 7 C7 l 7 top and bottom plans of the top and bottom fcelers, respectively.

The illustrated embodiment of the inven-y tion is described as follows: The breast beam 10 of the loom carries the detector slides 11 and 12 on opposite sides of the cloth 13 being woven. Supported upon the breast beam is the knock-off rod 14, which carries arms 15 and 16, the upper ends of which are adapted to engage the detector slides 11 and 12 and be pushed forwardly by such slides t0 turn the knoclnol rod 14. side oi' the loom the knock-oil' rod 14 is provided with a lever 17, which normally engages the shipper lever 18 when the latter is "in its running position, as shown in Fig.

At the shipper y l. Vhen the knock-ott rod is turned, the f arm 17 presses against the shipper lever 18 and pushes it out of its notch in the bracket 19, and thereby knocks ofiI the loom in the usual manner. Y

In this plush loom, as is usual, two shuttles 2O and 21 are employed which are picked simultaneouslyfrom one side to the other of the loom, each through its separate shed formed in the warp or w'arps. The- Warp is indicated at and the two wefts 23 and eps 24 ,are diagrammatically shown extending from the selvage across the warp and to the shuttles Q0 and 21. shuttles are shown side byside for the sake of clearness offillustration.` whereas in point of fact, one is supported immediately below the other; thus, 21 is received-in the lower box and 20 in the'upper boX of the lay. The is slidingly mounted in i detector slide 11 the detector slide support or carrier '25. It is normally held in forward position by the usual spring (not shown) on the lrnoelvoi rod let through the intervention of the arm 15 or arm 16. as the case may be. The lay 26 `is provided with a `reed 27, and in Fig. 2 the relation of the shuttlesto the detector slide is shown. The thread from `the upper shuttle enters the upper :teelcr space A28, and the thread from the lower shuttle enters the lower teeler space 29. The feelers arc horizontal forks, the upper keeler 30 being pro- In Fig'. `1 these two vided with two tines 31 whichproject rear- Y wardly from a pivot 32, and being provided with a forwardly extending' tail 33 having a laterally extended linger 34C which is received in a groove in the weft hammer hook block or control block 35. The slide 11 is provided with a rearwardly projecting wedge` shaped double grid 36. This Lgrid has three grid bars 37. `The three grid bars 37 are united at their front ends by a horizontal web 38, which extends tothe front endof the grids and conforms vin shape to the sha-pe et the grids atthis point. It extends forwardly and terminates a. short distance back of the point. The two outside grid plates 37 are united by a. strut 39. The outside grid hars are providedwith shoulders 40 against which the two fillings are adapted to strike at the time of the eXtreme for- Iitl ward movement of the lay. one fillingr sliding up on the u )per side of the grid plates, and the other filling slitting downward on the lower side of the grid plates. and both being arrested b v the shoulders ttl which position the fillingsy with respect to the feelers. The grid device may be made of a single casting. or mai7 be made of a mlmber of parte. Thus. in the illustrated embodiment the three grid plates are each an itegral plate spaced apart at their troni ends by two spacer plates whieh together comprise the part The rear end of tlie medial grid plate 3T is recessed to receive the strut 3f). rThe device is secured in place hy two rivets L'tl which pass through them and are riveted in the side walls ot the deteetor slide 11.

Two teeler guards 49. and ffii are provided on the detector slide. These guards extend rearwardly -from the upper and lower edges of the detector slide a distance slightlw7 greater than the distance to which the nose of the grid device extends. and afford a protection for the teelers to prevent their accidentally striking a misplaced shuttle. The two filling feelers are of similar eonstruetion, and both have their laterally extended fingers yn'ojeeting in the same direction into grooves in the weft hammer hook hloek The hook block or control block 35 is generally of a truncated lozenge Jform. its vertical height being greatest nearer the rear end than the torward end. and the top and bottom walls inelining toward each other trom this point. The weft hammer Lt-t is pivoted at 45 to the ear It? on the weft hammer hook block 8.3. The block is provided in its center with a slot 4S through which extends the pin 49 supported in the side walls of the detector slide il. As the weft hammer reeiprocates. the hook block 35 slides hack and forth on the pin. The

grooves are cnt in one side of the hook bloel: 35. The upper groove 50 receives the finger 34 of the upper filling fork it'l. and the lower groove .il receives the finger .i2 of the lower filling fork 51S. A hook .it is provided in this groove 50 which is adapted to engage the laterallv extended finger dit when. during the .forward movement of the hook bloeit 35, the. filling teeler having made its feeling movement. is not arrested by the filling. in which ease the finger 34 rises and engages the hook 5l. Then the continued forward movement of the hook bloelc 35 carries the detector slidey torwardhY and causes the knock-oil' rod to be turned and the loom to he stopped. The lower filling fork operates in a similar manner. The weights of the parts of the upper filling fork are such that it normallyv tends when freed by the entrance of its finger 34; into the wide portion of the groove 5t) to turn in the direction to cause its tines to engage the filling. It they do not engage the filling, the finger rises and engages the. hook Similarly. the lower filling f'eeler or filling fork tends to tip to came its filling feeling lines to move uinvardlv tio engage the filling. and therefore to cause the finger at the forward end of the fork tail to fall and to engage the lower hook corresponding to the upper hook fi-t.

The loom as described thus comprises a double filling f'eeler on each .side ofthe plush being woven. and the wedge-shaped grid device. when the lav approaches. enters between the two fillings extending from the selvage to the adjacent shuttle box7 separates those two fillings and causes them to ride, the one up and the other down on the top and bottom surfaces into position against the shoulders Attl. where they arrive in timed relation to the movements of the weft ha1nmer hook block. so that they are both free to turn at `auch filling' feeling time. and then in the absence of either one filling or both fillings. the fingers on the filling Yfeeler tails are engaged hv a hook or hooks of the weft hammer hook block and the deteetor slide is pulled forwardly h v the 'further movement of the weft hammer forwardly, thereby stopping the loom.

Tt is to be observed that in the illustrated embodiment of' the invention the failure of either filling on eaeh pick will operate to stop the loom.

The best embodiment of the invention in a plush loom eontemplates the use of the double filling feeler on both sides of the cloth being woven. hut it is apparent that useful advantages would he obtained by the use of one double filling' teeler on one side of the warp only. or by the employment of a filling feeler on one side of the warp to feel of one filling, and a filling feeler on the other side off the warp to feel of the other filling.

The partieular eonstruction of weft deteo tor illustrated and deserihed herein is of value. and ma)1 he used in any form of loom. Thus. as the weft hammer hook block or control hloclt' 235 moves forward. itv releases the tail of' the fork when the wide part of the groove :'itl presents itself to the tail Ill of the fork. Then the forli. which normally stands onliY .slightly above the filling. is permitted to engage the latter owing to the. widening of the groove. Tf filling is present. the latter supports the fork with the tail ill in position to engage the inclined pol'- tion below the hook :'i-t. Then as the weftl hammer hook block continues its; forward movement., this inclined surface engages the tail ot the forli and lifts` it (in the case of the upper forli. and depresses it in the case ot' the lower fork) and releases the pressure of the fork upon the filling. which is thereby treed from the fork when the shuttle Leeaeeel thrown. In'short, the construction is one in which the fork is pressed against the filling with very slight pressure and without the usual blow which occurs when in an ordinary loom the grid on the lay carries the weft violently against the depending tine of an ordinary fork. The fact that this construction is one in which the fork is applied with such light pressure to the filling makes the detector available for use with extremely light filling such as rayon, or other artificial silk, as such delicate engagement of the fork with the rayon will not injure or break it whereas, with the ordinary fork, the blow of the rayon carried by the grid against the fork tines .sometimes causes a severingof some of the filaments of the rayon filling.

It is immaterial, of course, vwhether the loom to which this invention is applied use-s one or more warp beams to supply the warp used in weaving. In some plush looms` two warp beams are used, the one supplying the warp for one shed, and the other supplyingr the warp for the other shed. In other plush looms one warp is used.

Vhile claims have been included directed to the feeler construction, it is intended to cover a feeler provided with only one fork, certain features of the feeler being as well adapted for a single fork detector as a double fork detector.

While the invention has found its principal use in plush looms employing two shuttles moving simultaneously in the same direction through two sheds, it is apparent that the invention may also be used in connection with looms employing two shuttles thrown in opposite directions at the same time, as in some looms, in which case a single feeler would be employed on each side of the loom which would feel on one pick of the thread from` one shuttle, and on the next pick of the thread from the other shuttle.

Having thus described the invention, what is claimed is:

l. A plush loom having, in combination, a lay having two shuttles for simultaneous picking movement, two weft detectors on one side of the loom, one detector having a down-feeling fork to feel the weft from the upper shuttle, and the other detector having an rip-feeling fork to feel the weft from the lower shuttle, stop mechanism, and connections between each detector and the stop mechanism to stop the loom'on the failure of weft from either shuttle.

2. A plush loom having, in combination.v a lay having two shuttles for simultaneous picking movement, a weft detector onroue side of the loom supported in horizontal position, means for controlling the detector having' provision for supporting it from feeling movement at all times except when the weft extends from the adjacent selvage. to the shuttle on the same side of the loom with the detector, stop mechanism, and connecthe weft extends from the selvage to the shuttle onthe same side of the loom, stop mechanism. and connections between the detector and the stop mechanism to stop the loom'upon failure of the weft in either shuttle.

4. A plush loom having, in combination, i

a lay having two shuttles for simultaneous picking' movement through two adjacent superposed sheds, two weft detectors on one side of the loom supported to feel by movements toward each other, a guide for separating the two wefts and presenting them to the detectors, stop mechanism, and connections between each detector and the stop mechanism to stop the loom on the failure of weft from either shuttle.

5. A weft detecting mechanism for looms having, in combination, a detector slidea weft fork pivoted on the slide having tines extending horizontally rearwardly and a tail extending horizontally forwardly from the pivot, having at its end a laterally extended finger', a grid mounted onl the slide, a weft hammer, a weft hammer hook mounted on t-he weft hammer provided with a groove to receive the laterally extending finger of the weft fork tail, such groove having two narrow end portions for preventing movement of the fork and a widened portion permitting vertical movement of the fork in the absence of weft, such widened portion being provided with a hook to engage the laterally extended finger on the tail of the weft fork in the absence of weft. stop mechanism, and connections between the detector slide and the stop mechanism to stop the loom on the failure of weft.

6. A double fork weft detector for plush looms having, in combination, a pair of horizontally arranged oppositely movable filling forks, and a detector slide upon which the forks are mounted provided with guards rearwardly extended from the slide to prevent engagement of the forks with a misplaced shuttle.

7. A weft detector mechanism for looms comprising a pivotally mounted filling fork having rearwardly extended filling feeling members and a forwardly 'extended tail, a

support for the fork upon which ity is pivoted, :1nd lnrving :1 renrwnrdlj,v extendod `1:11:1rd Vtor preventing occidental ntriking oit the shuttle hy the tiork.

S. A looln having.` in combination, :1 luy haring two shuttles for .-'inn1tt:1neon`-,` super posed pit:l i11; r movement, two snperposed wett detert'or.` on one side ot the looin, the Upper one havingr :1 down-feeling tort; :1nd tht` lower one having :1n np-tieling,r 'fork to feet the wet'ts t'roin the npper :1nd lower shntthm respertively. stop ineehnnisin, :1nd connectiom` hot'ween euch detrrtor :ind the strop mechanism to stop the looln on the fuit- 111'0 ot wett` Ytroni either Shuttle,

9. looln :1s defined in rlniin S provided with two snperpor'ed wett detectors on hoth`4 sides ot the looin.

10. A loom having. in conihinnt'ion, :1 luy having; two Shntth 'or simultaneous superposed picking nlorelnont. :1 pair ot' superposed weft; detectors on one side ot' the tooni haring opposit'cly feeling wett 'forksv to tout the weft from the upper :1nd lower shuttles respectively, stop lncchunisnn :1nd ConnertionS between eneh detector :1nd the stop 111etrtn11tinni to Stop the tooni on the t'nihne of weft fron] either shuttle.

ll. A. welt detector hnving, in eo1nhi11z1 tion. :1 guide htm-k, :1 grid, :1 feeling t'ortt', :1 gourd, :1nd n vibrating t-ontrot hlotrk having:r :i groove coinpriring` tirntI :1 narrow portion, then :1 wide portion to which tho no1-row portion lends, :1 locking` hook, :1 lifting in- Cline. :1nd tinnlly :1 Straight nztrrow portion, seid .t'ork having :1 tingrer extending into said groove to control the Afeeling; inorenlrnt of the torti.'

looln haring, in cfonthinution. :1 1:15' having' two f-h11ttle y Vt'or finniltoneon` pieking niovonient', two wet't dotoetowA ono :thorn the other on the .L-:nne side ot the looin. :1nd :1 control hlork which :intonnitirntly causes the opper weft fork t'o foei downward :tgziinst the npper wett :1nd the lower wett Vt'orh to vfeel upward :igninst tinl lower weft'.

In testimony whereotI l hure signed my nznne to this Speciticntion.

EDMOND GUILBERT, Jn. 

